Well, of course, the seed of this story began with Aliens of London and
the way Jackie reacted to Rose being missing right at the start of the
adventures. It raised a question that I had in the back of my mind about
what ordinary people would think about the TARDIS parked up there by the
flats on a regular basis. What would happen if The Doctor’s world
met the real world in such a way? If there was a crisis in the Powell
Street flats of that kind – a missing child – the stranger
in their midst might be suspected. The Doctor’s innocent habit of
watching the stars from the roof of the high rise might be seen as something
voyeuristic. The fact that he played with the children in the yard might
be misconstrued. And even decent people can turn into an angry mob if
their buttons are pushed.
Being Doctor Who there was a limit to how much could be
said about what was happening to the boy. And there was a happy ending.
All too often in the news we see these kind of things end in tragedy.
If this was fan fiction for Cracker or Inspector Frost or Taggart, or
CSI, then most likely the ending would have been darker. In Doctor Who,
at least, we are allowed happy endings, and that is what makes them nice
to write, even though it is possible to touch on hard issues like this